CODE EXAMPLE FOR JAVASCRIPT

Nested Array Filter

function display_message() {
  let arrayOfElements = [{
    "name": "a",
    "subElements": [{
      "surname": 1
    }, {
      "surname": 2
    }]
  }, {
    "name": "b",
    "subElements": [{
      "surname": 3
    }, {
      "surname": 1
    }]
  }, {
    "name": "c",
    "subElements": [{
      "surname": 2
    }, {
      "surname": 5
    }]
  }];
  // console.log(arrayOfElements);
var surname = 1;
  let filteredArray = arrayOfElements.filter((element) => element.subElements.some((subElement) => subElement.surname === surname));

  for(var data in filteredArray){
    filteredArray[data].subElements = {"surname": surname};
    }
  console.log(filteredArray);

}